21223023231001 has 4 divisors (see below), whose sum is σ = 21225156422500. Its totient is φ = 21220890039504.

The previous prime is 21223023230963. The next prime is 21223023231041. The reversal of 21223023231001 is 10013232032212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8939645525776 + 12283377705225 = 2989924^2 + 3504765^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223023231001 - 2⁹ = 21223023230489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223023231041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066580826 + ... + 1066600723.

It is an arithmetic number, because the mean of its divisors is an integer number (5306289105625).

Almost surely, 2^{21223023231001} is an apocalyptic number.

It is an amenable number.

21223023231001 is a deficient number, since it is larger than the sum of its proper divisors (2133191499).

21223023231001 is an equidigital number, since it uses as much as digits as its factorization.

21223023231001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133191498.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21223023231001 its reverse (10013232032212), we get a palindrome (31236255263213).

The spelling of 21223023231001 in words is "twenty-one trillion, two hundred twenty-three billion, twenty-three million, two hundred thirty-one thousand, one".